Finding the Fourth Proportional to 118,458.56, 163,461.56 and 64,740.18

Step by Step Solution

1. Step 1: Write the proportion equation
   118,458.56 : 163,461.56 = 64,740.18 : x
2. Step 2: Convert to fraction form
   118,458.56/163,461.56 = 64,740.18/x
3. Step 3: Cross multiply
   118,458.56x = 163,461.56 × 64,740.18
4. Step 4: Simplify right side
   118,458.56x = 10,582,530,817.48
5. Step 5: Solve for x
   x = 10,582,530,817.48/118,458.56
6. Step 6: Final answer
   x = 89,335.30